Stop mechanism for tube-making machines.



R. M. CLARK, G. AMBROSE & C. J. CLARK. STOP MECHANISM FOR TUBE MAKING MACHINES.

APPLICATION FILED NOV. 18, 1908.

COLUMBIA PMNOGRAPH co..wAsl-nNuToN, D. c.

R. M. CLARK, G- 'AMBROSE & C. 1. CLARK. STOP MECHANISM FOR TUBE MAKING MACHINES APPLICATION FILED NOV. I8, 1908.

1,165,072. Patented Dec. 21, 1915.

4 SHEETS$HEET 2.

COLUMBIA PLANOGRAPH 60.. WASMIN TON. n. c

R. M. CLARK, G. AMBROSE & C. J. CLARK. STOP MECHANISM FOR TUBE MAKING MACHlNES.

APPLICATION FILED NOV- 18, 1908- 1,165,072. Patented Dec. 21, 1915.

4 SHEETS-SHEET 3.

WITHE'EEEE: {3. if. @m ZZKW M (Law/u GP Z COLUMBIA PLANOORAPH co., WASHINGTON, D. c.

R. M. CLARK, G. AMBROSE & 6.1. CLARK. STOP MECHANISM FOR TUBE MAKING MACHINES.

' I APPLICATION FILED NOV-1B, 1908- 1,165,072. Patented Dec. 21, 1915.

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To gill whom it may concern rnic.

ROBERT M. CLARK, NEWTON; AN-DGEORGEAMBROSE AND GADVALLAIDEB J. CLARK,

F NEEDHAM,.MASSAGHUSETTS, ASSIG NORS T0 CENTRAL RAIL'WAY SIGNAL COMPANY; OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY. I.

- sror MncnANIsi/i scarves-MAKING MACHINES.

Be itknown that we, ROBERT MI CLARK, of Newton," in the county of Middlesex and. State of Massachusetts; (inonsn' Airnnosn, of .lleedha-in, in'the county'of Norfolk yin said' State, and CADWALLAD R J; CLARK, of said Needham, all citizens of the United'States,

especially eifective'by reason of the facility have invented a new and useful I1nprovemerit in'Stop Mecha'nism'forTube-Making 10' v clear, and exact description, reference being had to the accompanying drawings, forming Machines; of which the following is a full,

apart of thisfspecification, in explaining its nature; I I g Our,lnventionrelates to a machine for makin tubes out ofthe successive windin s b v b of a sheet of paper or other substance.

Our invention consists in various structural combinations and detailstending to makethe machine one comparatively simple in construction, easily operatable and one with whichtubes can be formed by it one after the. other.

Our invention can best be seen and under- 7 stood by reference 3 to the drawings in which .Figure 1 shows" the machine in plan, the work supplying table being omitted. F 2 shows the same in front elevation. 3 shows the entire machine in side elevation. Fig. is a section of a portion of the machine to show in elevation the rear side of one of the clutclrmembers in connection with the mechanism for stopping the machine as will hereinafter beiexplained. Fig; 5 shows mainly in vertical section but partially in front elevation the part shown in Fig. Fig. 6 is a section'on line 6 6 of Fig. 2 showing paper wound on mandrel. Fig. 7 is a sectional view showing the'mandrel thrown out, the tube being removed.

In the drawings, A represents a frame or table. 011 this are-mounted standards a, a fixed to the table by a bar 6& preferably integrally connecting the standards and fixed to the table by bolts a fastened by nuts (5.

The standards a, a support bearings a a in which turns a shaft a which is the immediate instrument for operating the mandrel B on which the tubes are formed as will hereinafter be explained. On the shaft a arranged just outside the respective bearings are collars (0 ,0 which restrain the shaft from longitudinal play. Arranged Specification of Letters Patent.

Fig.

opposing: friction disks adapted to occupy an engaging or-disengaging position withi'espect'to one another. Of the clutch mem bers ordisks the member a is'fixed'tothe' shaft a by a sleeve a. The clutch member theretoandniounted loosely on the shaft is V c a pulleya run by a belt a" from a pulley x turning on a shaft m arranged in bearings 00 The pulley a ha's on the rearside thereof ahub a in which is formed 'an'annula'r groove (4 Contained within this groove is an arm a ailixed by acollar a to a rod a which extends through the standards a, a and is loosely arranged to slide longitudinally therein lel with the plane of the shaft (i The longitudinal movement of the rod a in one direction or the other acts through the arm a running Within'the grooved hub a connected with the pulley a to move the clutch member (612 into or out of engagement with its complementary clutch memher a We have arranged whereby the clutch member (4 will be maintained in a normally inoperative position. This is accomplished by locating upon the shaft a outside thestandard a a collar a which, when the rod has been moved longitudinally to a certain position, is adaptedto draw against the side of the standard preventing further movement of the rod in the direction it is moved andpositioning the rod. Such position of the rod defines the normal inoperative position of the clutch member a inasmuch as when the rod is moved longitudinally to a position where the collar a thereon engages the side of the standard a the arm a" upon the rod will at the same time have moved the clutch member a away from or into a disengaging position with respect to the clutch member a Moreover the rod is held to normally maintain said position by means of a spring 0, arranged on the rod (4 outside the standard a and between the side of the standard and a collar a arranged on the-end of the rod, the tension of the spring acting to normally maintain the rod in the position above men- PatentedDec. 21,1915, A'pplicationfiledltovember18,1908; Seria1'No.463;161'. i

in a plane paralalso-on the shaft af'hetween its bearings is" a clutchcomprismg two clutch members a a, these members consisting respectively of 7 The arrangementis such, in other that when pressureis applied .tothe treadle a i'itlthroug'h the angular lever andin- .termediate connections will act todraw the rod a "in a longitudinaldirection when tioned-when thearm a" secured to it will hold the clutchrmember al in a disengaging position; '1

' For the purpose of moving the clutch member a out of the normally disengagingposition in which itiis maintained,-into an engaging position-with-respect to the clutch V member a there isp'rovided the, following mechanismr+Connecting with the forward end'of the rod a 'outside the standard a is a linkyai-which connects the rod to-one arm of, abent lever. a pivoted at the point a? to a lug a dependent from the; table A. Gonnectingwith the other arm-of the'lever a is a linkia securedto a fOOhfife2Ld1efl/ words,

the arrna fixed to the rod and contained mandrel when the mandrel upon being turned'willact to rwind th'e' sheet upon itself thereby, forming the tube. The sheets are" arranged'in a stack Oupon the table D' the ,edge of which approaches the mandrel so that as thesheets are'run oii the table they may successively be secured to the mandrel. The sheets are secured to the, mandrel by inserting the edge of the sheet in a slot '6 formed longitudinally in the mandrel, the

sheet becoming bent over the edge of the slot when the mandrel is'turned' (see Fig. 6)

When Soaifixed the sheet will not slip on the mandrel, but will continue to wind around the same as the mandrel isfurther turned.

.In order that the sheet may become tightly wound upon the mandrel during the formation of the tubethere is employed what may be termed a bearing roll E. This rollfis' supported to run in bearings e, e and is arranged between the edge of thetable D and the mandrel to bearagainst the mandrel'or the paper wound thereon, the roll running in a direction reverse to the direction ofthe mandrel with the efliectthat after a sheet of paper has been caught onto the mandrel and the mandrel turned, the bearing roll will in the first instance act to bendthe sheet over the edge ofthe slot in the mandrel in which the sheet is caught. The sheet will then continue to run over the bearing roll and onto the mandrel, the bearing roll acting to draw the'sheet tightly aroundthe mandrel andto press the successive windings of the sheet closely together. In order that the bearing roll I new 1 may moveaway from the'mandrel as the successive windings oi the sheet give body tothe tube, thebearing roll or spring wires 6 a Eachofthese wires is borne by'fla plugce fitting into the end of a standard e andheld therein by a screwj'efh.

W e have arrang a whereby th'bra-r irig roll maybe'movedadjustably toward 01, V away frornthe mandrel in orderv to vary; the bearing vtension'offthe roll {against the gmandrel or the sheetflwoundthereon; For

this purpo-sefeach of the standards is borne by: a base plate 're ldovetailed to; slide in a block '6 fastened to the'itable A. Making standards- 6* :is a SClWfei having a hand Wheel etch the end thereof. The screws-is supportedto turn 111a bearing 6 secured to" the table A to 'the rear of the standard. Ar;

rangedupon the screw at either side of the rather the, bearings: e,'-e in which/the 117,011 turns are borne by'yielding supports or I threadedcqlmection wlth reach one-oftne bearing are collars e fby; which'the screw may turn within the bearing; but cannot: move longitudinally, with the eiiect mas the respective screws are turned the stand} ard a supporting the bearing roll "may be 7 moved," whereby ,the tension of the bearing roll against the-mandreljor against the paperv Y wound, thereon may beadjustablyivar'ied as occasion mayfrequn'eb v determined position, namely, with the slot 1? of the'sheetl As'may be seen from thedraw- "Reference will now be made to the means for stopping themachine, the tube having 7 been formed. It is desirable thatthe mana 'drel B be stopped always in thesame'prel 1 inconvenient pOSltlOIliiOI" the llitl'OdllQillOIl' ings and especiallyby rreferenceto 'FigsI Y and 5, the'back of theclutch membera which asbefore described is the member afiixed to the'main driving shaft a is-m'ade dished or hollowed out by a circular incision a gradually increasing in depth to form an abrupt edge or stop a Adapted to'enter this incision made in the back of the clutch member, to engage the stop formed therein, is a dog F carried by an'arm f secured to the sliding rod a by a hub f loosely arranged upon the rod. The arm 7 is properly main- 1 V tained for the dog F to enter the incision formed in 'the back. of the clutch member and encounter, the stop by 'a "post f (at tached to the'standard (1), against which the arm bears, the arm being-yieldinglymain tained to bear against this post-by a coiled spring f arranged upon the rod a and at,

one end-secured to the hub f of the dog-can rying arm, and the other end of the spring attached'to a collar f fiXedto the rod. The hub f is backed by a stop f fixed in-the rod or so that at the same time the rod a is restored to its normal position by the spring a; upon the release ofpressure from the foot lever for disengaging the clutchmechanism and stopping the machine, the arm borne-by the sliding rod will cause the dog I F toenter the incision formed in the back berm is secured and' stopping further turn of the mandrel. The clutch member a?! will in the operation ofthe machine revolve ata relatively .high rateof speed and ac-.

cordingly upon disengagementof the clutch mechanism, will continue .toturn with a con;

, siderable degreeof momentum. Underthese circumstances if thedog F were introduced for this, however, i it will be seenthat by reason of the peculiar into the incision formedinthe clutchmemberat, a time when the clutchmember was in such position that the dog would-enter the incision at a-point just in front of the stop,

the v machine Wouldbe stopped too abruptly,

owing to the momentum of the clutch member and'the parts would be'likely to beceme disengaged or broken. Provision is made By reference to Fig.- 4

formof the incisionjmade in; the back of the clutch member the outer edge of the inoision is at a varying distance from the axial center of said member. In other words that part a rof the outer edge of the incision just in front of the stop a is nearer. the axial center ofthe clutch member than that part ,a of the outer edgeof the incision awayv from the point of the stop. ,Now the dog Fis somaintained by its'bearing against the arm or guide f that the dog will only enter the incisionalong the point or points of .the edge a and in consequence cannot enter the incision along the point or points of the edge a just in front of the stop so as to encounter the stop, but will at the point or points ofthe edge a encounter the rear face of the clutch member and will slip by the stop, entering the incision soas to encounter the stop only when the clutch .member, has turned so far that the dog can slip into the incision at the point or points of the In other words, the disposition of the dog and the arrangement ordisposition of the incision formed in the clutch member is such that the dog can enter the incision to. encounter the stop at all points ofthe incision except at or near to the point of the stop. If by chance the .dog is thrown into engagement with the clutch member at the point of the stop then the member must be further turned before the dog can enter the incision and encounter the stop.- Attenit has entered the incision at the point or points of the edge a will not bear tensionally against this edge, but the dog will simply slip bythe same. When, however, the

clutch memberhas so far turned that the dog encounters th e -edgea which, as before described, is nearer .theaxial center of the clutch member, then the dog encountering thisedge will, be forcedinwardly against the tension of its supporting spring pressed arm,,Wh1 ch is moved away from its bearing.

against-the ipost "f and which accordingly acts tohold the dog hard against the outer edge. ofthe-incision at' the point or points c -above mentioned, when the dog will actv as. a brake, and} les'senthe speedof the clutch member as before'described. lVe have taken advantage of this action-by so forming the" clutchmember that the outer edge a of the incision will lie graduallynearer the axial center. of the clutch member as ap proach is made to the stop with thejefiect of gradually increasing, the brake resistance, while at the very point of the stop theedge a is provided with an ofiset a into which the dogwill snap when the clutch member Will prevent it frombeing turned in either direction, this continuing until the withdrawal ofthe dog from the incision.

After, the tube has been formed it is re-' moved from the machine by drawing it off of the end of the mandrel. As was before described, one end of the mandrel-or the inner end thereof is securedto the driving shaft arfi. To insure proper rigidity and accuracy in turning we have found it desirable to support the outer end of the mandrel by a bearing. 5 represents this bearing supported on the end'of a standard 6 secured by a block b to the frame or table of the machine. To release the end ofthe mandrel from this bearing, in order to remove the tube, it is to be observed that thevbearing is an open bearing, open from the top side thereof, so that the mandrel can be lifted out of the same, and by pivoting the inner end ofthe mandrel to the shaft a as is done by a tenon bf fitting into a slot cut in the end of the shaft and fastened therein by a pin 6 the mandrel may be very easily turned up with respect to the shaft and the outer end thereof released from its bearing, when the tube may be removed therefrom.

In order that the mandrel may be turned up with respect to the shaft a and released from its bearing after the machine has been stopped and in order also that the mandrel shall have been turned to a position where, having been restored to its bearing, a fresh sheet may be inserted in the slot 6- formed in the mandrel, it is necessary for the driving shaft and mandrel carried by it to have been turned to a certain position and this position is determined by a proper disposition'of the stop a. In other words, by reason of the disposition of the stop a the driving shaft will always be moved "to stop in such position that the mandrel carried by it may be released from its bearing, or the mandrel having been restored to its' bearing,

a sheet from the table D may befixed to the mandrel Without further turning or -posit'ioning of the mandrel. I

"been described. It is suflicient to say,'therefore',;that in forming thetube afsheet' of fpape'risfirst fixed to the mandrel. Pressure" is then applied to the foot lever, when the clutch mechanism thrown'into an engaging position will actto driv e the shaft for turningthe mandrel and forming the tuber After the tube "has been" formed pressure Eon the foot lever is removed Whenfthe clutch mechanism'will assume its normal disengagingi positionandthe machine become stopped, 'Ihereupon the mandrel is released from its" bearing and the tube' removed therefrom. After this the mandrel is restored to its bearing, afresh sheet fixed thereto, when the operation is repeated. v i i i What We claim "as our invention is I 1.In a stop'mechanism, in combination, arotary'shaft', a stop'member fixed'on said shaft, said member having in itslate'ralface an incision and a stop shoulder in said in- .cision,.'the edge of said incision being ata difl'ere'nt' distance from the axis, of" said V shaft at points immediately in advance of said shoulder from its distance at; points angularly'distant therefrom, a stop dog movable longitudinally of said shaft into said incision to a position to engage said' shoulder in the rotation of said member, and means for yieldingly maintaining said dog at a distance fromthe axis of said shaft to prevent its entry into said incision immedi ately in advance of said shoulder and to permit its entry th'erei'ntoat points angularly distant from 'sai-d'shoulder. 4

2. "In a stop mechanism, in combination, a rotary shaft, a stop member fixed on said shaft, said member having in its lateral face an incision anda stop shoulder in said'in cision, the edge of said incision being at a distance from the axis of said shaft Which varies progressively from a point angularly distant from said shoulder to a point adja-' cent thereto to form a cam surface leading to said shoulder, a stop dog movable longitudinally of said shaft into said incision to a position to engage said shoulder in the rotation of said member, and 'means for yieldingly maintaining said dog at a distance from the axis of said shaft'to prevent its entry into said incision immediately "in 7 advance of said shoulder and to permit its 3. In a stop mechanism, in combination,

.Copies or this patent may be btam a for shoulder.

shaft, said stop member having in its lateral facean incision of progressively varyingdepth forminggastop shoulder in itsbot- The operation of the machine has already,

tom,=the edge of said incisionlbeing at a' different distance from the-axis ofsaid shaft at points immediately in advance of; said shoulder from its distanceat points angularlydistanttherefrom, stop dog, a rod on'i'vvhichsaid'dog is mountedand movable longitudinally ofsaid shaft to carry said dog into said incision to a positionto 'en-' gagesaid shoulder in ther'otation of said member, yielding means foractuating said rod, a; spring for turning said dog on said F rod and tending normally to move sald; deg

away from said incision :Wlth respect to the axis ofsaid"shaft',' and an arm for limiting the movement of said dog under the infiuenceof said spring and for guiding its movements longitudinally of said shaft, said armbeing arranged to prevent the entryof said dog into said incision immediately in advance of said shoulder an'd to permit its v entry thereinto at points 'angularlydistant-" from said' shoulder.

4. In a stop mechanism,

in combination, a rotary shaft, a' clutch comprising fast and loose clutch members onsaid shaft, said fast clutch member having in its lateral face an incision of progressively varying depth forming a s'topfshoulder in its bottom,the edge of said incision being at a diiferent Cl1S- tance from'the, axis of said shaft at points immediately in advance of said shoulder from its distance at points angularly distant therefrom, a rod movable longitudinally of said shaft to move said loose clutch member and release said clutch, a stop dog when said clutch is released into said incisionto a positlon to engage said shoulder yielding means for actuating said rod, a

carried by said rod and movable thereby spring for turningsaid dog on said rod and said shoulder and to permit its entrythereinto at points angularly distant from said ROBERT M. CLARK,

GEORGE AMBROSE.

GADWALLADER J. CLARK.

lVitnesses: r Gnonon N. CLARK,

I I. Nnorron.

five: cents each by adGressing the commissionerof Patents, Washington, D. 0.

105 .in the rotation of saidfast clutch member, j 

